Chimney-cowl.



J. T. POWELL;

CHIMNEY GOWL. APPLICATION FILED JUNE 9, 1911.

1,010,799. V Patented De c;5,1911.

INVENTOR John TPoipell COLUMBIA PLANOGRAPH 1:0,, WASHINGTON, D. c.

JOHN T. POWELL, OI DALLAS, TEXAS.

CHIMNEY-Cowl.

Specification of Letters Patent.

Patented Dec. 5, 1911.

Application filed .Tune 9, 1911. Serial No. 632,119.

To all whom it may concern:

Be it known that I, JOHN T. PownLL, a citizen of the United States, residing at Dallas, in the county of Dallas and State of Texas, have invented certain new and useful Improvements in Chimney-Cowls, of which the following is a specification.

My invention relates to new and useful improvements in chimney cowls. Its object is to provide a chimney cowl having the form of an elbow that may be revolubly.

mounted upon the top of a chimney, and which will be provided with a vane that will adapt it to discharge in the direction in which the wind is blowing.

Another object is to provide a chimney cowl having a base which may be adjusted so as to clamp upon chimney tops of various sizes.

A further object is to provide a screen obstructing the passage of the chimney cowl, so as to prevent the exit of large sparks or scraps of burning paper, means being also provided by which said screen may be aut0- matically freed from soot.

Finally the object of the invention is to provide a device of the character described that will be strong, durable, simple and eiiicient and comparatively easy to construct, and also one which will not be likely to get out of working order.

With these and various other objects in view, my invention has relation to certain novel features of the construction, an example of which is described in the following specification and illustrated in the accompanying drawing, wherein:

Figure 1 is a side elevation of the herein described chimney cowl having portions of its outer casing broken away to show the interior construction. Fig. 2 is a section looking down upon the chimney cowl, the section being taken on the line ww of Fig. 1.

Referring now more particularly to the drawing, wherein like numerals of reference designate similar parts in both the figures, the numeral 1 denotes the upper portion of a brick chimney upon which the base of the chimney cowl is clamped. This base consists of two rectangular members 2 and 2, each of which includes one side wall and two partial end walls, the end walls of the two members'bcing overlapped. Each of the end walls carries a pair of angle brackets 4, adjacent to its vertical edge, and the opposite brackets of the two members are con nected by bolts 5, by which the said members may be securely clamped upon the chimney cowl.

The base of the chimney cowl is surmounted by a tapering metal casing 6, of

square cross-section at its bottom and round cross-section at its top, the width being gradually reduced from bottom to top. The top of this casing communicates with a vertical pipe 7 rigidly mounted upon the casing, and the upper end of the pipe communicates with the vertical lower end of a curved elbow 8, the upper end of which is horizontal. The lower end of this elbow fits over the pipe 7 with suflicient freedom -bar9 is passed centrally through the lower portion of the elbow a short distance above the top of the pipe 7, a vane 10 being rigidly secured to one extremity of said bar, and a weight 11 being adjustable upon the other extremity. A vertical rod 12, centrally mounted within the chimney cowl, passes through the rod 9 and supports the weight of the parts 8, 10, and 11 upon its upper extremity. The rod 12 is supported from its lower end which passes through a cross-piece 13 horizontally positioned in the base of the cowl, the lower end of the rod being threaded and a nut being retained by said end above and below the bar 13. The upper extremity of the rod 12 is held vertical by a cross-piece 14:, horizontally mounted in the upper end of the pipe 7. A circular piece of wire screen 15 is rigidly secured to the under side of the bar 9 within the cowl 8, for the purpose of preventing the egress of large sparks or any light pieces of burning material which may be carried up the chimney, and which might possibly set fire to the roof if permitted to escape. The cross-piece 14 is positioned a slight distance below the screen 15, and carries a pair of brushes 16 which contact with the screen and dislodge the soot therefrom as the cowl is revolved due to change in the. direction of the wind. The bristles used in said brushes will preferably consist of steel wire.

The above described device, by adapting the discharge outlet of a chimney to face always in the direction in which the wind is blowing, increases the draft in the chimney and permits the smoke to escape more freely than it ordinarily would. The weight should be clamped upon the bar 9 in such a position that it will exactly counter-balance the weight of the vane 10, so that the cowl will be balanced relative to its pivotal center, and will rotate readily without noiseor 'friction.

The details and proportion of parts in the above described device may be varied in a number of ways without departing from the spirit of the invention, and the same is, therefore, presented as covering all such changes and modifications as may be included within the scope of the following claims.

hat I claim is:

1. In a chimney cowl, the combination with a base adapted to be clamped upon a chimney top, of a curved elbow forming a quarter turn, pivotally mounted upon the base, a vane projecting from said elbow in the direction of its outlet, a weight by which the vane is counter-balanced, a screen horizontally positioned within the elbow, and adapted to rotate therewlth, and brushes stationary within the elbow contacting with the screen.

2. In a chimney cowl, the combination with a base adapted to be clamped upon a chimney top, of a vertical rod centrally mounted in said base and projecting above the same, a revoluble curved elbow communicating with said bar and forming a quarter turn, a horizontal bar passing through the elbow parallel to the direction of its discharge and supported by said ver- JOHN T. POWELL.

WVitnesses R. BRUCKNER, J. S. MURRAY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

